A possible version:

　　Good learners must have good ways. Discussing in a group really helps me have a better understanding of what I’ve learned. It broadens our mind and allows us more chances to express our thoughts.

　　Shy and nervous, my classmate Jeff used to hide himself behind books. Answering questions in public was quite a difficult job for him. Once our math teacher asked us to solve a difficult problem. I encouraged Jeff to discuss his idea with us and we found his way was so creative . Then we advised him to write his answer on the blackboard and explain it to us .Believe it or not, he did it and we saw his great improvement after that.

　　Discussing in a group not only makes me enjoy the happiness of being a good learner but also deepens the friendship between Jeff and me. Knowledge comes from communicating and questioning. By discussing, we learn more wisely and better.